At the heart of the MVR Technology is the proprietary Advanced Thermal Recycling (ATR) technology providing high-level emissions control and materials recovery. To control nitrogen oxide (NOx) emissions, the facility combines noncatalytic and catalytic reduction to reduce the emissions on a par with a modern natural gas-fired power plant operating in southern California.
The design employs dual wet scrubbers to handle chlorine gas and sulfur oxides, converting the pollutants into high-grade commercial products. The chlorine is recovered in the first wet scrubber, which uses water to remove acid vapors. The weak acid is then sent to a separate plant within the facility to create commercial grade hydrochloric acid.
In the second scrubber, sulfur oxides are recovered via a treatment process involving lime to form gypsum for use in wallboards and other building materials. Most waste-to-energy plants remove the chlorine and sulfur oxides together in one scrubber, creating a waste stream that has no commercial value.
The ash is also recycled. Unlike conventional WTE plants, which process fly ash and bottom ash together, MVR facility to treats the ash types separately for optimum recovery and reuse. The bottom ash is processed to recover residual ferrous and nonferrous metals and glass products, which are washed and screened to create a mixture of different minerals for use as an aggregate in the production of cement or asphalt, or as structural construction fill.
The fly ash is divided into boiler fly ash and filter fly ash. The former is recycled internally and injected into the emission-control system along with activated carbon. The filter fly ash is fed into an extraction system, where the ash is treated sequentially with ammonia and acid to remove metals that can be recycled in metal foundries. The solid residue from the extraction process, including minerals from the filter fly ash and spent carbon, along with residual boiler fly ash and fine particles washed out from the bottom ash are returned to the combustion system.
For more information:
Klean Industries Inc.
Tel: +1.604.637.9609
Email: sales@kleanindustries.com
